body {
	font-family: "微软雅黑";
	height: 100%;
}

html {
	height: 100%;
}

* {
	margin: 0;
	padding: 0;
}

.box {
	width: 100%;
	height: 100;
	position: absolute;
	left: 50%;
	top: 50%;
	transform: translate(-50%, -50%);
}
/*.top img{
			padding: 10px 0 10px 0;
			height: 100px;
		}*/
；
		.main-body {
	width: auto;
}

.background-image {
	width: auto;
	height: 100%;
	background-size: cover;
}

.title {
	text-align: center;
	font-size: 20px;
	padding: 0 10%;
}

.title h1{
	text-align: left;
	color:#FFF;
	margin-bottom: 20px;
}

.title h1 span{
	text-align: right;
	font-size:15px;
	color:red;
}

.main-body {
	float: 50%;
	width: auto;
	border: 1px solid #d8d8d8;
	text-align: center;
}

.main_body {
	padding: 10px 30px;
}

.main_body form p {
	font-size: 15px;
	color: #333;
	margin-top: 5px;
}

.main_body form p input {
	padding: 0 5px;
	background: transparent;
	width: 100%;
	height: 55px;
}

.main_body form p .bt {
	color: #fff;
	width: 100px;
	height: 35px;
	background-color: red;
	border: 0px;
}

.main_body form p a {
	position: relative;
	left: 115px;
	color: #333;
	text-decoration: none;
}

.main_body span {
	float: right;
	background: transparent;
	font-size: 12px;
}

.form-group input {
	background: rgba(255, 255, 255, 0);
	border: none;
	outline: none;
	border-bottom: 1px solid #fff;
	color: #fff;
	width: 80%;
	height: 40px;
	line-height: 40px;
	font-size: 15px;
}

.form-group button {
	width: 80%;
	height: 40px;
	font-size: 16px;
	background: dodgerblue;
	border: none;
	color: #fff;
}

.button {
	padding-top: 30px;
}

.text {
	height: 40px;
	width: 80%;
	margin: 10px auto;
}

.text a {
	color: dodgerblue;
}

.text .register {
	float: left;
}

.text .forget {
	float: right;
}

input[placeholder], [placeholder], *[placeholder] {
	color: red !important;
}

.form-group input::-webkit-input-placeholde {
	color: #fff;
}

h3 {
	color: white;
	font-size: 40px;
	padding-bottom: 70px;
}
/*媒体查询：注意and后面空格的添加*/
/*iphone: w < 768px*/
@media screen and (max-width: 768px) {
	.container {
		background-color: green;
	}
}
/*pad: w >= 768  && w< 992*/
@media screen and (max-width: 992px) and (min-width: 768px) {
	.container {
		width: 750px;
		background-color: blue;
	}
}
/*中等屏幕   w >= 992  && w<1200*/
@media screen and (max-width: 1200px) and (min-width: 992px) {
	.container {
		width: 970px;
		background-color: pink;
	}
}